Gardaí are attending the scene and diversions are in.
An incident has been reported on the N18 between the Limerick tunnel and Cratloe Moyle Junction Four and Cratloe Junction Five.
Live95 reports that Mayorstone Gardaí have confirmed that they are dealing with a road traffic collison, and have said motorists can expect major delays in the area this afternoon due to diversions in place.
There are no reports of any serious injuries.
More information to come as news develops.